Willie Nelson performs at The Backyard Live Oak Amphitheater in Austin, Texas, on Sunday, April 28, 2013. The concert was an early birthday celebration for Nelson, who turns 80 on Tuesday, and it was a benefit for the volunteer fire department in West, Texas, which is nearby where Nelson grew up in Abbott, Texas. A fertilizer plant exploded April 17 killing at least 14 people, including emergency responders, and hurting about 200 others. (AP Photo/Austin American-Statesman, Jay Janner) AUSTIN CHRONICLE OUT, COMMUNITY IMPACT OUT, MAGS OUT; NO SALES; INTERNET AND TV MUST CREDIT PHOTOGRAPHER AND STATESMAN.COM.
Photo: Jay Janner, MBO

Willie Nelson performs at The Backyard Live Oak Amphitheater in...

Photo: Sam Um/Master Martial Arts

Can you spot the guy who wrote 'Crazy'?

Photo: Sam Um/Master Martial Arts

Can you spot the guy who wrote...

Willie Nelson arrives at the 11th Annual John Varvatos Stuart House Benefit on Sunday, April 13, 2014, in West Hollywood, Calif. (Photo by Richard Shotwell/Invision/AP)
Photo: Associated Press

WEST HOLLYWOOD, CA - APRIL 13: Willie Nelson and family performs onstage at the John Varvatos 11th Annual Stuart House Benefit presented by Chrysler, Kids Tent by by Hasbro at John Varvatos Boutique on April 13, 2014 in West Hollywood, California. (Photo by Gabriel Olsen/Getty Images for John Varvatos)
Photo: Getty Images For John Varvatos

WEST HOLLYWOOD, CA - APRIL 13: Willie Nelson and family performs...

WEST HOLLYWOOD, CA - APRIL 13: Musician Willie Nelson performs at the John Varvatos 11th Annual Stuart House Benefit presented by Chrysler, Kids Tent by by Hasbro at John Varvatos Boutique on April 13, 2014 in West Hollywood, California. (Photo by Gabriel Olsen/Getty Images for John Varvatos)
Photo: Getty Images For John Varvatos